Patents by Inventor Bo E. Johansson

Bo E. Johansson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cutting and flanging tools
    Patent number: 5230237
    Abstract: A combined punch and flange forming tool comprises a double-ended female die 7 and a punch 4. Initially, a first portion 2 of the female die is used in association with a cylindrical portion 8 of the punch to cut the required hole in the work-piece 11. Thereafter, the female die is reversed and flange forming profiles 17,18 the punch and female die respectively are used to deform the work-piece to provide the desired flange surrounding the hole.
    Type: Grant
    Filed: May 8, 1992
    Date of Patent: July 27, 1993
    Inventor: Bo E. Johansson